Lamps USA describes the differences between a variety of light cover types, such as cylinder shades, empire shades and Tiffany shades. Empire shades and bell shades provide a wider spread of light from the bottom of the shade than the top, while drum shades produce a more even light distribution.
Lamps USA details the differences between a variety of lamp shades and instructs users on how to select a suitable cover for a given type of light. One of the more ornate covers is the Tiffany shade, which was created by Louis Tiffany and is made from many small pieces of colored glass. Bell shades are simpler light covers, made from fabric and curving inwards on the sides to produce the signature shape.